diff options
Diffstat (limited to 'src/runtime/sys_linux_arm.s')
| -rw-r--r-- | src/runtime/sys_linux_arm.s | 29 |
1 files changed, 0 insertions, 29 deletions
diff --git a/src/runtime/sys_linux_arm.s b/src/runtime/sys_linux_arm.s index 29eb8eb077..216781ef7a 100644 --- a/src/runtime/sys_linux_arm.s +++ b/src/runtime/sys_linux_arm.s @@ -390,35 +390,6 @@ TEXT runtime·usleep(SB),NOSPLIT,$12 SWI $0 RET -// Use kernel version instead of native armcas in asm_arm.s. -// See ../sync/atomic/asm_linux_arm.s for details. -TEXT cas<>(SB),NOSPLIT,$0 - MOVW $0xffff0fc0, R15 // R15 is hardware PC. - -TEXT runtime·cas(SB),NOSPLIT,$0 - MOVW ptr+0(FP), R2 - MOVW old+4(FP), R0 -loop: - MOVW new+8(FP), R1 - BL cas<>(SB) - BCC check - MOVW $1, R0 - MOVB R0, ret+12(FP) - RET -check: - // Kernel lies; double-check. - MOVW ptr+0(FP), R2 - MOVW old+4(FP), R0 - MOVW 0(R2), R3 - CMP R0, R3 - BEQ loop - MOVW $0, R0 - MOVB R0, ret+12(FP) - RET - -TEXT runtime·casp1(SB),NOSPLIT,$0 - B runtime·cas(SB) - // As for cas, memory barriers are complicated on ARM, but the kernel // provides a user helper. ARMv5 does not support SMP and has no // memory barrier instruction at all. ARMv6 added SMP support and has |